Java Magazine, Sept/Oct 2018
Figure 1 SPECjbb2015 Composite performance results ORACLE COM JAVAMAGAZINE SEPTEMBER OCTOBER 2018 59 the leading edge Because the intent of this article is not to report the best score obtainable on a specific hardware system but instead to study the performance a typical end user would see I intentionally did not fine tune low level JVM parameters or kernel settings on either system Check the SPEC scores for the processors as reported by the hardware vendors to compare the highest achievable numbers available with JVM options tuning SPECjbb2015 results Figure 1 presents the SPECjbb2015 101 Composite results Critical jOPS and Max jOPS for a single socket Intel Xeon Gold 6140 system and a ThunderX2 CN9975 single socket system both with DDR4 2666 memory and running Ubuntu 1604 Higher scores are better The JVM command line options used for these runs were very common for SPECjbb2015 runs On the Arm based system I used the following Xmx24G Xms24G Xmn16G XX AlwaysPreTouch XX UseParallelGC XX UseTransparentHugePages XX UseBiasedLocking On the x86 based system I used this Xmx24G Xms24G Xmn16G XX AlwaysPreTouch XX UseParallelGC XX UseTransparentHugePages XX UseBiasedLocking
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